Self-locking wagon-jack.



No. 645,529. I Patnted Mar. |3, land.

0. LONG. I

SELF LOCKING WAGON JACK.

(Application filed Aug. 4, 1899.)

(No Model.)

PATENT OFFICE.

OBED LONG, or MARSHALLTOWN, IOWA.

SELF-LOCKING -WAGON-JAC K.

SPECIFICATION forming part of Letters Patent No. 645,529, dated March13, 1900.

Application filed August 4, 1899.

T0 aZZ whom it may concern:

Be it known that I, OBED LONG, a citizen of the United States, residingat Marshalltown, in the county of Marshall and State of Iowa, haveinvented a new and useful Self-Locking Wagon-Jack, of which thefollowing is aspecificatiou.

My object is to provide a strong, durable, and efficient self lockingcompound lever wagon-jack specially adapted for lifting and securelysupporting wagons when heavily loaded.

My invention consists in the construction, arrangement, and combinationof parts, as hereinafter set forth, pointed out in my claim, andillustrated in the accompanying drawings, in which- Figure 1 is a sideview showing the parts adjusted relative to each other as required to beplaced under the'axle of a vehicle preparatory to lifting the axle andtaking off the wheel. Fig.2 is a top view of my invention as shown inFig. 1. Fig. 3 shows my invention as applied to practical use and theoperative parts in locked position.

The letterA designates the base, consisting of a straight and flat barthat is broader at its ends than at its intermediate or body portion andhas short cross-pieces b fixed thereto to serve as feet, that may varyin width as required to retain the complete device in an uprightposition. An upright composed of two mating parts c and o is pivotallyconnected with one endof the base A, and an upright composed of twoparts d and d is connected with the other end by means of bolts in sucha manner that the mating parts will not contact. A lever F of the firstorder is fulcrumed between the top ends of the upright at the front endof the base A. A straight flat bar H, stepped at its top edge to providea plurality of rests i for supporting axles at different height, isextended between the parts 01 and d of the rear upright and pivotallyconnected with the short arm of the lever F by meansof links 71; and la.Pins (1, fixed in the lower end portion of the bar H, engage the upright01 as required to prevent longitudinal movement of said bar relative tosaid upright. A toggle-jointed lever L, composed of straight parts m, ispivotally connected at its top end with the stepped bar H, at its bottomwith the rear upright by means of links a, and at its center with thetop portion of Serial No- 726,107- (No model.)

the front upright by a straight bar 1, as clearly shown in Figs. 1 and3. A wheel-support com posed of two mating parts 8 and s is fixed to therear end of the stepped bar H and a wheel 8", mounted between theirlower ends in such a manner that a person can take hold of the lever Fand lift it, so that the weight of the jack will rest upon the wheel, sothat it can be moved about advantageously in placing it under the axleof a wagon, and When in proper position relative to the axle of awagonbearing down the long arm of the lever F will ac tuate thetoggle-jointed lever L as required for elevatingthestepped bar H, andthereby the axle of a wagon, as shown in Fig. 3, as required for takingoff a wagon-wheel, and as the bar H ascends the wheel 8 is lifted offthe floor or ground, and the extended base A will rest securely thereonas required to prevent the jack from tilting when it is supporting anaxle in an elevated position, and the togglejointed lever will be in alocked position, as shown, by reason of its center having passed thedead-point in its orbit.

It is'obvious wood or metal maybe used in the construction of myinvention and jacks may vary in size, weight, and power for differentvehicles.

Having thus described the construction and operation of my invention,its practical use and utility will be readily understood by personsfamiliar with the art to which it pertains,

and

What I therefore claim-as new, and desire to secure by Letters Patent,is-

A wagon-jack comprising a straight bar for a base, an upright pivotallyconnected with each end portion of said bar, a lever of the first orderpivoted to the top of the front up right, a toggle-jointed leverconnected with the rear upright, a straight bar stepped in its top edgelinked to the short arm of the lever of the first order and pivotallyand slidingly connected with the rear upright,and a straight barpivotally connected with the center of the toggle-jointed lever and thetop portion of the front upright, arranged and combined to operate inthe manner set forth and for the purposes stated.

OBED Lone.

Witnesses:

J. C. TUFFREE, J os. TUFFREE.

